/**
 * Created by Jackie on 2017/1/11.
 */

var turnplate = {
    restaraunts: [],				//大转盘奖品名称
    colors: [],					//大转盘奖品区块对应背景颜色
    images: [],
    outsideRadius: 192,			//大转盘外圆的半径
    textRadius: 155,				//大转盘奖品位置距离圆心的距离
    insideRadius: 68,			//大转盘内圆的半径
    startAngle: 0,				//开始角度
    bRotate: false				//false:停止;ture:旋转
};
//动态添加大转盘的奖品与奖品区域背景颜色
// turnplate.restaraunts = ["谢谢参与", "20元话费", "50元话费", "流量500M", "谢谢参与 ", "500元加油卡", "3000元手机 ", "5000元手机"];
turnplate.colors = ["#7cc1f3", "#faca00", "#7cc1f3", "#faca00", "#7cc1f3", "#faca00", "#7cc1f3", "#faca00"];

var rotateTimeOut = function () {
    $('#wheelcanvas').rotate({
        angle: 0,
        animateTo: 2160,
        duration: 8000,
        callback: function () {
            alert('网络超时，请检查您的网络设置！');
        }
    });
};

//旋转转盘 item:奖品位置; txt：提示语;
var rotateFn = function (item, txt, cb) {
    var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length * 2));
    if (angles < 270) {
        angles = 270 - angles;
    } else {
        angles = 360 - angles + 270;
    }
    $('#wheelcanvas').stopRotate();
    $('#wheelcanvas').rotate({
        angle: 0,
        animateTo: angles + 1800,
        duration: 8000,
        callback: function () {
            // if (txt.indexOf('谢谢') > -1) {
            //     alert(txt);
            // } else {
            //     alert('恭喜您获得：', txt);
            // }

            cb && cb()

            turnplate.bRotate = !turnplate.bRotate;
        }
    });
};

$('.pointer').click(function () {
    return

    if (turnplate.bRotate)return;
    turnplate.bRotate = !turnplate.bRotate;
    //获取随机数(奖品个数范围内)
    var item = rnd(1, turnplate.restaraunts.length);
    //奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
    rotateFn(item, turnplate.restaraunts[item - 1]);
    /* switch (item) {
     case 1:
     rotateFn(252, turnplate.restaraunts[0]);
     break;
     case 2:
     rotateFn(216, turnplate.restaraunts[1]);
     break;
     case 3:
     rotateFn(180, turnplate.restaraunts[2]);
     break;
     case 4:
     rotateFn(144, turnplate.restaraunts[3]);
     break;
     case 5:
     rotateFn(108, turnplate.restaraunts[4]);
     break;
     case 6:
     rotateFn(72, turnplate.restaraunts[5]);
     break;
     case 7:
     rotateFn(36, turnplate.restaraunts[6]);
     break;
     case 8:
     rotateFn(360, turnplate.restaraunts[7]);
     break;
     case 9:
     rotateFn(324, turnplate.restaraunts[8]);
     break;
     case 10:
     rotateFn(288, turnplate.restaraunts[9]);
     break;
     } */
    console.log(item);
});

function rnd(n, m) {
    var random = Math.floor(Math.random() * (m - n + 1) + n);
    return random;

}

//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
// window.onload = function () {
//     drawRouletteWheel();
// };

function drawRouletteWheel(prizes) {
    turnplate.restaraunts = []
    prizes.forEach(function (item) {
        turnplate.restaraunts.push(item.name)
    })

    var canvas = document.getElementById("wheelcanvas");
    if (canvas.getContext) {
        //根据奖品个数计算圆周角度
        var arc = Math.PI / (turnplate.restaraunts.length / 2);
        var ctx = canvas.getContext("2d");
        //在给定矩形内清空一个矩形
        ctx.clearRect(0, 0, 422, 422);
        //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式
        ctx.strokeStyle = "#FFBE04";
        //font 属性设置或返回画布上文本内容的当前字体属性
        ctx.font = '16px Microsoft YaHei';

        for (var i = 0; i < turnplate.restaraunts.length; i++) {
            var angle = turnplate.startAngle + i * arc;
            ctx.fillStyle = turnplate.colors[i];
            ctx.beginPath();
            //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）
            ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
            ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
            ctx.stroke();
            ctx.fill();
            //锁画布(为了保存之前的画布状态)
            ctx.save();

            //----绘制奖品开始----
            ctx.fillStyle = "#d9450a";
            var text = turnplate.restaraunts[i];
            var line_height = 2;
            //translate方法重新映射画布上的 (0,0) 位置
            ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

            //rotate方法旋转当前的绘图
            ctx.rotate(angle + arc / 2 + Math.PI / 2);

            function drawimg(i) {
                var img = document.getElementById("p-" + i);
                img.onload = function () {
                    ctx.drawImage(img, -45, -5);
                };
                ctx.drawImage(img, -45, -5);
            }

            ctx.font = '16px Microsoft YaHei';
            /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
            if (text.indexOf("M") > 0) {//流量包
                ctx.fillText(text, -ctx.measureText(text).width / 2, -9);

            } else if (text.indexOf("M") == -1 && text.length > 8) {//奖品名称长度超过一定范围
                ctx.fillText(text, -ctx.measureText(text).width / 2, -9);
            } else {
                //在画布上绘制填色的文本。文本的默认颜色是黑色
                //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
                ctx.fillText(text, -ctx.measureText(text).width / 2, -9);
            }

            drawimg(i)
            if (text.indexOf("谢谢参与") >= 0) {
                /*  var img = document.getElementById("sorry-img");
                 img.onload = function () {
                 ctx.drawImage(img, -52, -5);
                 };
                 ctx.drawImage(img, -52, -5);*/
            }
            //把当前画布返回（调整）到上一个save()状态之前
            ctx.restore();
            //----绘制奖品结束----
        }
    }
}

